chooyan-eng

import 'dart:developer';

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

void main() {
  runApp(
    const ProviderScope(child: MyApp()),
  );
}

chooyan-eng

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override

chooyan-eng

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(

chooyan-eng

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(

chooyan-eng

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override

chooyan-eng

パッケージ、アプリプロジェクトをそれぞれ作成

flutter create -t package calendar_logic
flutter create -t package calendar_widget
flutter create flutter_calendar

GitHubリポジトリ作成

chooyan-eng

#!/bin/bash

if [ $# -ne 1 ]; then
  echo "USAGE: a single Widget name must be given as an argument. See example below" 1>&2
  echo "USAGE: sh flutter_creater.sh InkWell" 1>&2
  exit 1
fi

WIDGET_NAME=$1
WIDGET_NAME_LOWER=`echo ${WIDGET_NAME} | tr '[:upper:]' '[:lower:]'`

chooyan-eng

void main() {
  var clazz = MyClass();
  clazz..printNum() // -> 1
       ..increment(1)
       ..printNum(); // -> 2
}

class MyClass {
  var num = 1;
  

chooyan-eng

void main() {
  var nums1 = [1, 2, 3];
  nums1[1] = 99; // valid
  print(nums1[1]);
  
  const nums2 = [1, 2, 3];
  nums2[1] = 99; // invalid: runtime error
  print(nums2[1]);
  
  var nums3 = const [1, 2, 3];

chooyan-eng

void main() {
  var date = "2019/03/13";
  print("It is $date today."); // -> It is 2019/03/13 today.
}